Open Vmware vSphere DVD on your Windows 2008 or Windows 2012 server and then Click vCenter Single Sign On
Prerequisites are Windows .NET 3.5 SP1 and Windows Installer 4.5 that is required if you use bundled SQL server 2008 r2 sp1.
click on install button and choose the language you want to install
Click on net button three time to pass unnecessary parts and get the point. I want to install the primary SSO node to my system
Basic SSO installation option is my option
Your user name is admin@system-Domain and you must type a password for this user that will be your SSO administrator. Never forget this password
If you have separate SQL server, choose second option. I want to choose first option
type password required for DBA admin and User accounts
Check the name of Vcenter server
Use the service accountactually I logged in to this server with my service account which is local administrator and it is being used for SSO installation.
Choose the directory you want to install and next the page and come to port which SSO will use it.
Default port 7444]
And Install SSO